WO2013176151A1 - Non-contact power supply transformer - Google Patents
Non-contact power supply transformer Download PDFInfo
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- WO2013176151A1 WO2013176151A1 PCT/JP2013/064132 JP2013064132W WO2013176151A1 WO 2013176151 A1 WO2013176151 A1 WO 2013176151A1 JP 2013064132 W JP2013064132 W JP 2013064132W WO 2013176151 A1 WO2013176151 A1 WO 2013176151A1
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- magnetic pole
- core member
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- pole core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/126—Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
- B60L53/36—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles by positioning the vehicle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/30—AC to DC converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/40—DC to AC converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M7/00—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
- B60M7/003—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway for vehicles using stored power (e.g. charging stations)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Definitions
- the present invention relates to a power supply transformer of a non-contact power supply system that supplies power to an electric vehicle or the like in a non-contact manner, and an electrical component connected to the power supply transformer, and relates to an apparatus that facilitates installation of the transformer in a vehicle or the like.
- a secondary transformer (power receiving transformer) 33 of a power supply transformer 30 of a non-contact power supply system is installed on the floor of the vehicle as shown in FIG.
- a system has been developed in which a primary-side transformer (power transmission transformer) 31 installed on the ground side is fed in a non-contact manner using electromagnetic induction.
- the plug-in hybrid vehicle that is charged has a motor 53 as a drive source together with the engine 54, and a secondary battery 51 that is a power source for the motor, and an inverter that converts the direct current of the secondary battery 51 into alternating current and supplies the motor to the motor 52.
- the ground side converts the AC of the commercial power source into DC, and the variable voltage rectifier 10 that varies the voltage, and the inverter 20 that generates high-frequency AC from the DC
- a power transmission transformer 31 that is one of the non-contact power supply transformers 30 and a primary side series capacitor 32 connected in series to the power transmission transformer 31 are provided.
- the vehicle side is connected in parallel between a power receiving transformer 33 which is the other of the non-contact power feeding transformer 30, a rectifier 35 for converting alternating current into direct current for the secondary battery, and the power receiving transformer 33 and the rectifier 35.
- a secondary parallel resonant capacitor 34 FIG. 9 shows an example of a circuit diagram of this non-contact power feeding system.
- Patent Document 1 discloses a non-contact power supply transformer that has a large allowable amount of displacement and gap fluctuation and can be configured in a small size. As shown in FIGS. 10A to 10F, this non-contact power supply transformer has a ferrite core 40 configured in an H shape, and parallel portions on both sides of the H shape are magnetic pole portions 41 and 42, which corresponds to an H-shaped horizontal bar.
- the electric wire 50 is wound around the portion to be wound, that is, the winding core member 43 (portion connecting the magnetic pole portions).
- 10A shows a state where the electric wire 50 is wound around the ferrite core 40
- FIG. 10D shows a state where the electric wire 50 is not wound around the ferrite core 40.
- 10B is a cross-sectional view taken along line AA in FIG. 10A
- FIG. 10C is a cross-sectional view taken along line BB in FIG. 10A.
- FIG. 10E is a cross-sectional view taken along line AA in FIG. 10D
- FIG. 10F is a cross-sectional view taken along line BB in FIG. 10D.
- the efficiency of the transformer is 95% and the horizontal direction (y in FIG. 10A).
- Direction misalignment tolerance is ⁇ 150 mm
- front and rear direction misalignment tolerance is ⁇ 60 mm
- the efficiency when the standard gap length is expanded to 100 mm is 92%.
- the characteristics to satisfy are obtained.
- a non-contact power supply transformer using an H-shaped core has been prototyped having a large capacity of 10 kW or more that enables rapid charging.
- FIG. 11 shows an example of a non-contact power supply transformer having an H-shaped core, which the inventors of the present invention prototyped as a product for vehicle mounting or ground installation.
- a coil body is formed by winding an electric wire 50 around a portion to be wound between the magnetic pole portions 41 and 42 (in this figure, the electric wire 50 is wound and cannot be seen).
- the fixing plate 60 is attached to the outside of the floor of the vehicle in a product for mounting on a vehicle.
- the front surface of the fixing plate 60 (the surface facing the counterpart transformer) to which the coil body is fixed is covered with a resin cover, but the resin cover is omitted in FIG.
- the fixed plate 60 is made of an aluminum plate, and has a function of magnetically shielding the leakage magnetic flux of the coil body and a function of radiating heat generated from the coil body when energized.
- a lead-in / out hole 61 for introducing / leading out the end of the electric wire 50 is formed at an intermediate position between the magnetic pole part 41 and the magnetic pole part 42.
- the reason why the lead-in / out hole 61 is provided at this position is as follows.
- FIG. 12 shows a distribution of leakage magnetic flux generated from a coil body having an H-shaped core. The leakage magnetic flux is represented by hatching around the fair light core 40.
- the distribution density of the leakage magnetic flux decreases as it moves away from the electric wire 50, and is most at the central position 100 (position of the line segment 100-100) between the magnetic pole part 41 and the magnetic pole part 42. Lower. Therefore, even if the lead-in hole 61 is opened in the fixed plate 60 at this position and the electric wire is drawn out, the magnetic shield function of the fixed plate 60 is not impaired.
- the present invention has been made in consideration of such circumstances, and an object thereof is to provide a non-contact power supply transformer that does not require a wiring space for installation and is easy to install.
- the non-contact power supply transformer includes a winding core in which a coil body connects a part of a pair of parallel magnetic pole core members perpendicular to the magnetic pole core member and a magnetic pole core member forming a pair of parallel magnetic pole parts. A member and an electric wire wound around the winding core member.
- the coil body is fixed to a fixed plate having a magnetic shield function and a heat dissipation function, and the connection position of the winding core member to the magnetic pole core member is biased to one side from the longitudinal center of the magnetic pole core member.
- the space between the pair of magnetic pole core members including the end portion having the longer distance to the position is used as at least a part of the arrangement space of the components to be electrically connected to the electric wire.
- the position of the winding portion of the H-shaped core is offset to one side, and the space thus free is used as a placement space for components that are electrically connected to the electric wire.
- the arrangement space may be set in a region away from the electric wire wound around the winding core member and the magnetic pole core member. That is, the arrangement space is set in a region where the leakage magnetic flux from the coil body is small so that the component does not suffer loss due to the leakage magnetic flux.
- the primary coil is constituted by the electric wire wound around the winding core member, and the capacitor connected in series with the primary coil using the arrangement space between the magnetic pole core members. May be arranged.
- a capacitor connected in series with the primary coil can be incorporated in the power transmission transformer having the primary coil.
- the secondary coil is constituted by the electric wire wound around the winding core member, and the arrangement space between the magnetic pole core members is used to connect in parallel with the secondary coil.
- a capacitor may be arranged.
- a capacitor connected in parallel to the secondary coil can be built in the power receiving transformer having the secondary coil.
- the secondary coil is constituted by the electric wire wound around the winding core member, and the arrangement space between the magnetic pole core members is used to connect in parallel with the secondary coil.
- a rectifier connected in parallel to the capacitor may be disposed.
- a power receiving transformer having a secondary coil can incorporate a capacitor and a rectifier connected in parallel to the secondary coil.
- the rectifier may be directly attached to the fixed plate.
- the fixed plate which is the base plate of the housing can be used as a cooling plate for the rectifier.
- the coil body and the components that are electrically connected to the coil body are accommodated using the arrangement space between the magnetic pole core members, so that it is not necessary to secure the wiring space for these components.
- the burden of wiring work during installation is reduced.
- the primary side series capacitor Cs and the secondary side parallel capacitor Cp are determined by the transformer constant as shown in (Equation 1) and (Equation 2), it is desirable to install them in the vicinity of the transformer.
- f is a power frequency applied to the non-contact power supply transformer.
- x p is the impedance
- x 0 ′ is the secondary side converted excitation reactance of the non-contact power supply transformer
- x 2 is the secondary side leakage reactance of the non-contact power transformer.
- C s ′ is a secondary side converted primary series capacitor
- x s ′ is an impedance
- x 1 ′ is a secondary side converted primary leakage reactance of the non-contact power supply transformer.
- FIG. 1 is a figure showing the non-contact electric supply transformer concerning an embodiment.
- FIG. 2 is a diagram illustrating the inside of the power transmission transformer according to the embodiment.
- FIG. 3 is a diagram illustrating the inside of the power receiving transformer according to the embodiment.
- FIG. 4 is a diagram illustrating the outer shape of the power transmission transformer and the power reception transformer according to the embodiment.
- FIG. 5 is a diagram showing a form in which a rectifier is directly attached to a fixed plate.
- FIG. 6 is a diagram illustrating measured values of the transformer constant of the contactless power transfer transformer according to the embodiment.
- FIG. 7 is a diagram illustrating a graph representing the positional deviation characteristics of the non-contact power supply transformer according to the embodiment.
- FIG. 1 is a figure showing the non-contact electric supply transformer concerning an embodiment.
- FIG. 2 is a diagram illustrating the inside of the power transmission transformer according to the embodiment.
- FIG. 3 is a diagram illustrating the inside of the power receiving transformer according to the embodiment.
- FIG. 8 is a diagram illustrating an example of a non-contact power feeding system for a vehicle.
- FIG. 9 is a diagram illustrating an example of a circuit diagram of the non-contact power feeding system of FIG.
- FIG. 10A is an explanatory diagram of a coil body having an H-shaped core, and shows a state in which the coil is wound.
- 10B is a cross-sectional view taken along line AA in FIG. 10A.
- 10C is a cross-sectional view taken along line BB in FIG. 10A.
- FIG. 10D is an explanatory diagram of a coil body having an H-shaped core, and shows a state where the coil is not wound.
- FIG. 10E is a cross-sectional view taken along line AA in FIG. 10D.
- FIG. 10F is a sectional view taken along line BB in FIG. 10D.
- FIG. 11 is a diagram illustrating an example of a non-contact power supply transformer including an H-shaped core.
- FIG. 12 is a diagram illustrating an example of a leakage magnetic flux distribution of a coil body having an H-shaped core.
- FIG. 1 shows a contactless power supply transformer according to an embodiment of the present invention.
- the coil body cannot be seen because the magnetic pole core members 141 and 142 constituting a pair of parallel magnetic pole portions and the winding core member orthogonal to the magnetic pole core members 141 and 142 (in this figure, the electric wire 150 is wound) ) And the electric wire 150 wound around the winding core member. In that respect, it is the same as the coil body having the H-shaped core of FIG.
- connection position of the winding core member to the magnetic pole core members 141 and 142 is the magnetic pole core member 141. , 142 is different from the coil body of FIG. 11 in that it is biased to one side from the longitudinal center and the core shape is “C-shaped”.
- the coil body is fixed to a fixed plate 160 made of an aluminum plate that is a base plate of the housing.
- a space generated by moving the electric wire 150 and the winding core member in one direction in the longitudinal direction of the magnetic pole core members 141 and 142 is used.
- a region away from the magnetic pole core members 141 and 142 is used as an arrangement space 70 for components to be electrically connected to the electric wire 150.
- the primary side series capacitor 32 (see FIG. 8) connected in series with the primary side coil is arranged in the arrangement space 70.
- a secondary side parallel resonant capacitor 34 (see FIG. 8) connected in parallel with the secondary side coil is arranged in the arrangement space 70.
- a rectifier 35 see FIG. 8) connected in parallel with the secondary side parallel resonant capacitor 34.
- FIG. 2 shows a power transmission transformer 131 in which a primary printed circuit board 32 is arranged by mounting a printed circuit board in the arrangement space 70.
- FIG. 3 shows a power receiving transformer 133 in which a mounting printed board is attached to the arrangement space 70 and the primary series capacitor 32 and the rectifier 35 are arranged.
- FIG. 4 shows the external appearance of a power transmission transformer 131 and a power reception transformer 133 in which the resin cover 162 of the casing is fixed to the fixed plate 160.
- the component placement space 70 may be further extended outward from the space between the pair of magnetic pole core members 141 and 142.
- the distribution of the leakage magnetic flux generated from the coil body decreases as the distance from the electric wire 150 and the magnetic pole core members 141 and 142 increases.
- the rectifier 35 may be directly attached to the fixed plate 160 and the fixed plate 160 may be used as a cooling plate for the rectifier 35.
- FIG. 6 shows the measured values of the transformer constants of “the state where a printed circuit board not mounted with components” and “the state where a printed circuit board mounted with components is installed” normalized by the transformer constant of “the state where there is no built-in component”. ing. In either case, the change in the transformer constant and the theoretical maximum efficiency is small, and it can be seen that there is almost no influence by the built-in components.
- FIG. 7 shows a change in efficiency when the power transmitting transformer and the power receiving transformer are shifted in the y direction.
- the non-contact power supply transformer according to the present invention is easy to install and can be widely used for non-contact power supply of various mobile objects such as electric vehicles and plug-in hybrid vehicles.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Coils Or Transformers For Communication (AREA)
- Inverter Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
充電を受けるプラグインハイブリット車は、エンジン54とともにモータ53を駆動源として有し、モータ用の電源である二次電池51と、二次電池51の直流を交流に変換してモータに供給するインバータ52とを備えている。 As an example of a system for charging a battery of an electric vehicle or a plug-in hybrid vehicle, a secondary transformer (power receiving transformer) 33 of a
The plug-in hybrid vehicle that is charged has a
一方、車両側は、非接触給電トランス30の他方である受電トランス33と、二次電池のために交流を直流に変換する整流器35と、受電トランス33と整流器35との間に並列接続された二次側並列共振コンデンサ34とを備えている。
図9は、この非接触給電システムの回路図の一例を示している。 In the non-contact power feeding system for feeding power to the
On the other hand, the vehicle side is connected in parallel between a
FIG. 9 shows an example of a circuit diagram of this non-contact power feeding system.
下記特許文献1には、位置ずれやギャップ変動の許容量が大きく、且つ、小型に構成できる非接触給電トランスが開示されている。この非接触給電トランスは、図10A~図10Fに示すように、フェライトコア40をH字形に構成し、H字の両側の平行する部分を磁極部41、42とし、H字の横棒に相当する部分、すなわち巻線コア部材43(磁極部間を繋ぐ部分)に電線50が巻回される。なお、図10Aは、フェライトコア40に電線50が巻回された状態であり、図10Dは、フェライトコア40に電線50が巻回されていない状態である。また、図10Bは、図10AのA-A線に沿った断面図であり、図10Cは、図10AのB-B線に沿った断面図である。同様に、図10Eは、図10DのA-A線に沿った断面図であり、図10Fは、図10DのB-B線に沿った断面図である。 In this system, even when the stop position of the vehicle is shifted and the
また、H字形コアを用いる非接触給電トランスでは、急速充電を可能にする10kW以上の大容量のものも試作されている。 In the non-contact power supply transformer using the H-shaped core, when 3 kW is supplied by the transmitting and receiving transformers facing each other with a standard gap length of 70 mm, the efficiency of the transformer is 95% and the horizontal direction (y in FIG. 10A). Direction misalignment tolerance is ± 150 mm, front and rear direction misalignment tolerance (± x in FIG. 10A) is ± 60 mm, and the efficiency when the standard gap length is expanded to 100 mm is 92%. The characteristics to satisfy are obtained.
In addition, a non-contact power supply transformer using an H-shaped core has been prototyped having a large capacity of 10 kW or more that enables rapid charging.
この製品では、磁極部41、42の間を繋ぐ被巻線部(この図では電線50が巻かれていて見えない)に電線50を巻回してコイル本体が形成され、このコイル本体が筐体のベース板である固定板60に固定されている。固定板60は、車両実装用の製品では、車両の床の外側に取り付けられる。なお、実際の製品では、コイル本体を固定した固定板60の前面(相手トランスとの対向面)が樹脂カバーによって覆われるが、図11では、樹脂カバーを省略している。 FIG. 11 shows an example of a non-contact power supply transformer having an H-shaped core, which the inventors of the present invention prototyped as a product for vehicle mounting or ground installation.
In this product, a coil body is formed by winding an
図12は、H字形コアを有するコイル本体から発生する漏洩磁束の分布を示している。漏洩磁束は、フェアライトコア40の周囲に示すハッチングで表している。磁極部41と磁極部42との中間位置では、電線50から離れると漏洩磁束の分布密度が低くなり、磁極部41と磁極部42との中央位置100(線分100-100の位置)では最も低くなる。そのため、この位置の固定板60に導出入孔61を開けて電線を引き出しても、固定板60の磁気シールド機能は損なわれない。 The
FIG. 12 shows a distribution of leakage magnetic flux generated from a coil body having an H-shaped core. The leakage magnetic flux is represented by hatching around the
この非接触給電トランスでは、H字形コアの巻線部の位置を片側にオフセットさせ、それにより空いたスペースを、電線に電気接続する部品の配置スペースとして利用している。 The non-contact power supply transformer according to the present invention includes a winding core in which a coil body connects a part of a pair of parallel magnetic pole core members perpendicular to the magnetic pole core member and a magnetic pole core member forming a pair of parallel magnetic pole parts. A member and an electric wire wound around the winding core member. The coil body is fixed to a fixed plate having a magnetic shield function and a heat dissipation function, and the connection position of the winding core member to the magnetic pole core member is biased to one side from the longitudinal center of the magnetic pole core member. The space between the pair of magnetic pole core members including the end portion having the longer distance to the position is used as at least a part of the arrangement space of the components to be electrically connected to the electric wire.
In this non-contact power supply transformer, the position of the winding portion of the H-shaped core is offset to one side, and the space thus free is used as a placement space for components that are electrically connected to the electric wire.
つまり、部品が漏洩磁束により損失を受けないように、配置スペースは、コイル本体からの漏洩磁束が少ない領域に設定する。 In the non-contact power supply transformer of the present invention, the arrangement space may be set in a region away from the electric wire wound around the winding core member and the magnetic pole core member.
That is, the arrangement space is set in a region where the leakage magnetic flux from the coil body is small so that the component does not suffer loss due to the leakage magnetic flux.
この場合、一次側コイルを有する送電トランスに、一次側コイルに直列接続するコンデンサを内蔵させることができる。 In the non-contact power supply transformer of the present invention, the primary coil is constituted by the electric wire wound around the winding core member, and the capacitor connected in series with the primary coil using the arrangement space between the magnetic pole core members. May be arranged.
In this case, a capacitor connected in series with the primary coil can be incorporated in the power transmission transformer having the primary coil.
この場合、二次側コイルを有する受電トランスに、二次側コイルに並列接続するコンデンサを内蔵させることができる。 Moreover, in the non-contact power supply transformer of the present invention, the secondary coil is constituted by the electric wire wound around the winding core member, and the arrangement space between the magnetic pole core members is used to connect in parallel with the secondary coil. A capacitor may be arranged.
In this case, a capacitor connected in parallel to the secondary coil can be built in the power receiving transformer having the secondary coil.
この場合、二次側コイルを有する受電トランスに、二次側コイルに並列接続するコンデンサ及び整流器を内蔵させることができる。 Moreover, in the non-contact power supply transformer of the present invention, the secondary coil is constituted by the electric wire wound around the winding core member, and the arrangement space between the magnetic pole core members is used to connect in parallel with the secondary coil. And a rectifier connected in parallel to the capacitor may be disposed.
In this case, a power receiving transformer having a secondary coil can incorporate a capacitor and a rectifier connected in parallel to the secondary coil.
この場合、筐体のベース板である固定板を整流器の冷却板として利用することができる。 In the contactless power transformer of the present invention, the rectifier may be directly attached to the fixed plate.
In this case, the fixed plate which is the base plate of the housing can be used as a cooling plate for the rectifier.
図1は、本発明の実施形態に係る非接触給電トランスを示している。
コイル本体は、並行する一対の磁極部を構成する磁極コア部材141、142と、磁極コア部材141、142に直交する巻線コア部材(この図では電線150が巻回されているために見えない)と、巻線コア部材に巻回された電線150とで構成されている。その点では、図11のH字形コアを持つコイル本体と同じであるが、本実施例の非接触給電トランスでは、巻線コア部材の磁極コア部材141、142に対する接続位置が、磁極コア部材141、142の長手方向の中心から一方に偏っており、コア形状が“C字形”である点で、図11のコイル本体と違っている。
このコイル本体は、筐体のベース板であるアルミ板から成る固定板160に固定されている。 Embodiments of a non-contact power supply transformer according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
FIG. 1 shows a contactless power supply transformer according to an embodiment of the present invention.
The coil body cannot be seen because the magnetic
The coil body is fixed to a fixed
送電トランスでは、この配置スペース70に、一次側コイルと直列接続する一次側直列コンデンサ32(図8参照)を配置している。
また、受信トランスでは、この配置スペース70に、二次側コイルと並列接続する二次側並列共振コンデンサ34(図8参照)を配置している。また、受信トランスでは、さらに、二次側並列共振コンデンサ34と並列に接続する整流器35(図8参照)を配置することも可能である。 In this non-contact power supply transformer, a space generated by moving the
In the power transmission transformer, the primary side series capacitor 32 (see FIG. 8) connected in series with the primary side coil is arranged in the
In the receiving transformer, a secondary side parallel resonant capacitor 34 (see FIG. 8) connected in parallel with the secondary side coil is arranged in the
また、図3は、配置スペース70に実装プリント基板を取り付けて一次側直列コンデンサ32及び整流器35を配置した受電トランス133を示している。
また、図4は、固定板160に筐体の樹脂カバー162を固定した送電トランス131及び受電トランス133の外観を示している。
図2、図3に示すように、部品の配置スペース70は、一対の磁極コア部材141、142に挟まれたスペースから更に外側に拡張してもよい。 FIG. 2 shows a
FIG. 3 shows a
FIG. 4 shows the external appearance of a
As shown in FIGS. 2 and 3, the
なお、整流器35は、図5に示すように、固定板160に直接取り付けて、固定板160を整流器35の冷却板として利用してもよい。 In the space between the pair of magnetic
As shown in FIG. 5, the
それを確かめるため、非接触給電トランスに「内蔵部品が無い状態」、「部品未実装のプリント基板(PCB)を設置した状態」及び「部品実装のプリント基板を設置した状態」の3状態を設定し、各状態でのトランス特性を測定して、それらを比較した。
図6は、「内蔵部品が無い状態」のトランス定数で正規化した「部品未実装のプリント基板を設置した状態」及び「部品実装のプリント基板を設置した状態」のトランス定数野測定値を示している。いずれの場合も、トランス定数及び理論最大効率の変化は小さく、部品内蔵による影響は殆ど無いことが分かる。 Thus, even if the primary
In order to confirm this, three states are set for the non-contact power supply transformer: “No built-in component”, “Installed component printed circuit board (PCB)” and “Installed component mounted printed circuit board” Then, the transformer characteristics in each state were measured and compared.
FIG. 6 shows the measured values of the transformer constants of “the state where a printed circuit board not mounted with components” and “the state where a printed circuit board mounted with components is installed” normalized by the transformer constant of “the state where there is no built-in component”. ing. In either case, the change in the transformer constant and the theoretical maximum efficiency is small, and it can be seen that there is almost no influence by the built-in components.
図7は、送電トランスと受電トランスとがy方向にずれたときの効率の変化を示している。ここでは、図9の回路におけるインバータ20の入力端電力と整流器35の出力端電力とを測定して効率を算出し、y方向の位置ずれが無い状態での効率を基準値に採り、算出した効率を正規化している。
図7から、y方向の位置ずれの対称性が確保されていることが明らかである。 In this non-contact power supply transformer, since the
FIG. 7 shows a change in efficiency when the power transmitting transformer and the power receiving transformer are shifted in the y direction. Here, the input end power of the
From FIG. 7, it is clear that the symmetry of the positional deviation in the y direction is ensured.
20 インバータ
30 非接触給電トランス
31 送電トランス
32 一次側直列コンデンサ
33 受電トランス
34 二次側並列共振コンデンサ
35 整流器
40 フェライトコア
41 磁極部
42 磁極部
43 巻線コア部材
50 電線
51 二次電池
52 インバータ
53 モータ
54 エンジン
60 固定板
61 導出入孔
70 配置スペース
131 送電トランス
133 受電トランス
141 磁極コア部材
142 磁極コア部材
150 電線
160 固定板
162 樹脂カバー DESCRIPTION OF
Claims (6)
- コイル本体が、並行する一対の磁極部を構成する磁極コア部材と、
前記磁極コア部材と直交して、並行する一対の前記磁極コア部材の一部分を接続する巻線コア部材と、
前記巻線コア部材に巻回された電線とを備え、
前記コイル本体が、磁気シールド機能及び放熱機能を備えた固定板に固定され、
前記巻線コア部材の前記磁極コア部材に対する接続位置が、前記磁極コア部材の長手方向の中心から一方に偏っており、
前記接続位置までの距離が長い方の端部を含む一対の前記磁極コア部材に挟まれたスペースが、前記電線に電気接続する部品の配置スペースの少なくとも一部に利用されている非接触給電トランス。 A magnetic pole core member that forms a pair of parallel magnetic pole portions,
A winding core member that connects a part of the pair of magnetic pole core members that are orthogonal to and parallel to the magnetic pole core member;
An electric wire wound around the winding core member,
The coil body is fixed to a fixed plate having a magnetic shield function and a heat dissipation function,
The connection position of the winding core member to the magnetic pole core member is biased to one side from the longitudinal center of the magnetic pole core member,
A non-contact power supply transformer in which a space between a pair of the magnetic pole core members including an end portion having a longer distance to the connection position is used as at least a part of an arrangement space for components to be electrically connected to the electric wire. . - 請求項1に記載の非接触給電トランスであって、
前記配置スペースが、前記巻線コア部材に巻回された電線及び前記磁極コア部材から離れた領域に設定されている非接触給電トランス。 The contactless power supply transformer according to claim 1,
The non-contact power supply transformer in which the arrangement space is set in a region away from the electric wire wound around the winding core member and the magnetic pole core member. - 請求項2に記載の非接触給電トランスであって、
前記巻線コア部材に巻回された電線が一次側コイルを構成し、前記部品が、前記一次側コイルと直列に接続されたコンデンサである非接触給電トランス。 The contactless power transformer according to claim 2,
A non-contact power supply transformer in which an electric wire wound around the winding core member constitutes a primary coil, and the component is a capacitor connected in series with the primary coil. - 請求項2に記載の非接触給電トランスであって、
前記巻線コア部材に巻回された電線が二次側コイルを構成し、前記部品が、前記二次側コイルと並列に接続されたコンデンサである非接触給電トランス。 The contactless power transformer according to claim 2,
A non-contact power supply transformer in which an electric wire wound around the winding core member constitutes a secondary coil, and the component is a capacitor connected in parallel with the secondary coil. - 請求項2に記載の非接触給電トランスであって、
前記巻線コア部材に巻回された電線が二次側コイルを構成し、前記部品が、前記二次側コイルと並列に接続されたコンデンサ、及び、前記コンデンサと並列に接続された整流器である非接触給電トランス。 The contactless power transformer according to claim 2,
The wire wound around the winding core member constitutes a secondary coil, and the component is a capacitor connected in parallel with the secondary coil, and a rectifier connected in parallel with the capacitor. Contactless power transformer. - 請求項5に記載の非接触給電トランスであって、
前記整流器が、前記固定板に直接取り付けられている非接触給電トランス。 The contactless power supply transformer according to claim 5,
A non-contact power supply transformer in which the rectifier is directly attached to the fixed plate.
Priority Applications (5)
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EP13793641.5A EP2854146B1 (en) | 2012-05-21 | 2013-05-21 | Non-contact power supply transformer |
JP2014516818A JP6151246B2 (en) | 2012-05-21 | 2013-05-21 | Contactless power transformer |
US14/401,365 US9502176B2 (en) | 2012-05-21 | 2013-05-21 | Contactless power supply transfer transformer |
CN201380026444.6A CN104321842B (en) | 2012-05-21 | 2013-05-21 | Non-contact power supply transformer |
HK15105987.7A HK1205346A1 (en) | 2012-05-21 | 2015-06-24 | Non-contact power supply transformer |
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US (1) | US9502176B2 (en) |
EP (1) | EP2854146B1 (en) |
JP (1) | JP6151246B2 (en) |
CN (1) | CN104321842B (en) |
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US10065515B2 (en) | 2014-03-04 | 2018-09-04 | Technova Inc. | System for wirelessly supplying power during moving |
JP2016009687A (en) * | 2014-06-20 | 2016-01-18 | 矢崎総業株式会社 | Coil unit |
JP2016116314A (en) * | 2014-12-15 | 2016-06-23 | トヨタ自動車株式会社 | Power transmission device |
JPWO2016143341A1 (en) * | 2015-03-11 | 2018-01-11 | パナソニックIpマネジメント株式会社 | Non-contact power supply device and non-contact power supply system |
Also Published As
Publication number | Publication date |
---|---|
CN104321842B (en) | 2017-03-22 |
CN104321842A (en) | 2015-01-28 |
HK1205346A1 (en) | 2015-12-11 |
EP2854146B1 (en) | 2017-01-18 |
JPWO2013176151A1 (en) | 2016-01-14 |
EP2854146A4 (en) | 2016-01-27 |
US20150155094A1 (en) | 2015-06-04 |
JP6151246B2 (en) | 2017-06-21 |
US9502176B2 (en) | 2016-11-22 |
EP2854146A1 (en) | 2015-04-01 |
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